Safety mechanism for vehicle tanks



Oct. 26 1926.

P. S. SHIELD SAFETY MECHANISM Fon VEHICLE TANKS l/VVENR Vif J? F411 LLL A TTOHNE Y Oct. 26 1926.

P. S. SHIELD SAFETY MECHANI'SM FOR VEHICLE TANKS Filed March 12, 1925 2 Sheets-Sheet 2 Patented Oct. 26, 1926.

illllvlf@ N matin Patri. s. sI-IIELD, or cINcINNArI, oI-IIo, AssIGNon To AUGUSTINE Davis, Jn., or

CINCINNATI, OHIO.

SAFETY ivIEciIANIsM ron vEnIcLI: TANKS.

Application iled March 12, 1925. Serial No. 14,996.

The invention relates to dispensing tanks, A

and more particularly to tank trucks vfor making deliveries of` gasoline or explosive Vliquid in cities, and the object is to provide an important relation and cooperationof operating parts of a simplev and reliable nature compelling the driver to close his vemergency valve or other safety valve in rear end boX bro-ken away;

Fig. 2 is a fragmentary plan view of the faucets and related Ythe tank; Y A v Fig. 3 is a rear elevation ofthe parts seen in Fig. 2; and n Fig. 4 is a side elevation on a larger scale, with parts broken away and in section, of one of the faucets and the relatedparts, showing in fully and broken lines two positions of the hose connection guard, the hose connection being shown attached.

rlChe drawing represents a tank truck the longitudinal tank body of which is subdivided into separate tank chambers 2, each having a bottom outlet 3 commanded by an emergency valve 4, which is movable up and down in the lower part of the tank, away from and to a seat. These valves are intended to be closed except when deliveries of gasoline or other liouid are being made, and are kept closed by spring pressure, gravity or fthe pressure of the liquid. They are operated by suitable mechanism, illustrated as of a known form comprising pull connections 5 extending from the valves upward through the interior and the top of the tank, a control rod 6 extending longitudinally over the upper portion of the tank to which these branch connections are connected, a vertical rock-shaft 7 to which the rear end of the control rod is connected, said rock-shaft passing downward within a bucket-box, or other box, 8 at the Vrear end of the tank, and a lever handle 9 on this shaft, the lever handle being pivotally connected with the shaft so that it may be tilted upand down to engage or disengage it with a holding lug` 10 for holding the valve mechanism in the open condition when desired.

parts at the'rear end ofl The .invention isvnot necessarily limited to a unit control for the'valves of a plurality of compartments.

As is customary in these tanks,\pipes v11 are shown extending from the out-lets 3 rearwardly beneath the tank, and terminating at the rear ends in faucets 12, the quick- *closing spring-actuated valves of which may sockets 18 in the usualmanner.

The screw-threaded nozzles 14 are formed be opened by wrench handles appliedk tothe for hose-connections, the vehicle tank being designed to make enclosed, hose deliveries only, to underground storage tanks, as distinguished from bucket deliveries. For this purpose, 'an interlock is provided 'between the hose connection or connections and the emergency valve or valves, requiring the valve, or the valves, tobe closed in order that the` hose maybedisconnected. This prevents the driver from driving` away through city. streets with his emergency valves unclosed, and thereby insures that, even though the faucets or piping should be broken by collision, the iniiammable contents of the tank will not escape.

Sleeves 15 are mounted slidably on the nozzles so that their enlarged lower parts or guards 16 will either enclose or expose the hosereceiving ends. The guards are adapted when in the lower position to encan not be applied to remove them, while when the guards or sleeves are retracted to y the upper position, the hose can be put on or ta ren off. The sleeves are 'shown provided with rods 17 which slide in bearings 18 on the sides of the faucets.l the upper ends of these rods being related to a cooperating interlock member 19 in the form of a slide-rod 2O mounted to slide in bearings 21 on the lower part of the box 8 and carrying obstructing fingers or portions 22. In one position of the member these obstructions stand directly in the path of upward movement of the rods 17, so that the sleeves 15 can not be raised. ln the other'position of the members the parts are out of line, so that the sleeves canfbe retracted. The rod ZO is shown connected with the operating mechanism by a crank 23 on the lower end of the rock-shaft 7, loosely pivoted to an arm 24: on the rod, the relation being such when :the valves are open the rod is in obstructing position. It will be understood that after putting on the hose the corresponding sleeve must be lowered before the emergency valve' or valves can be opened, as otherwise the fingers 22 wouldv be obstructed by the upwardly 'proj ecting rods l? ofthe sleeves.

The guard sleeves 1.5 may be non-positively held in the two positions by springpressed pins 25 cooperative with spaced grooves 26 in the rods 17. Y

lVhile the preferred .embodiment and mode of applying the invention has been described in detail, it will be understood that the invention is not limited to the precise forni of the parts and mechanism illustrated. The form, location and specific nature ot the valve, closing of which is to be compelled before disconnecting the hose, may be varied within the generic aspect ot' the invention, and the type ot valve operating means or controls Vmay likewise be varied.

W'hat is claimed as new is:

l. In a tank vehicle, Vthe combination of delivery means having a valve and a hose connection, means. for controlling said valve,"

and an interlock between said hose connection and said valve controlling means compelling the valve Vto be closed in order that the hose may be disconnected.

2. In a tank vehicle7 a tank having a bottom outlet, a valve in the tank commanding said outlet, operating mechanism connected with said valve, anda pipe leading from said outlet and terminating in a faucet adapted to receive a hose, in combination with aisleeve lnovably arranged on the faucet nozzle so as to enclose or expose the hose connection, and a member operatively connected with said operating mechanism and 'forming .an obstruction to the retraction of sait sleeve when said mecl-anism is inthe open condition.

3. In a tank vehicle, the combination of a delivery connection designed to receive a hose, a safety valve, a movable guard associated with said delivery .connection constructed and arranged in one position to obstruct removal of the hose, and mea-ns operatively connected with said valve and preventing movement of said guard to unobstructing position unless the valve is closed.

et. In a tank vehicle., the combination of a delivery connection designed to receive a hose, a safety valve, valve controlling means, and a lock for the hoseconnection operatively related to said valve controlling means and preventing disconnection .oit the hose unless said valve controllingmeans is operated to cause the valve to close.

PAULS. SHIELD. 

